I agree... The Rem 710 is a nice rifle, but not as nice as the 700. The 710 has been rumored to have had issues, but don't know if they have improved it and/or fixed it yet.
A .270 would do everything you need. It would blow the .30-30 out of the water, I mean, no question...
Slap a 3-9 scope on it and you're all set to hunt anything that moves on this continent! Put the scope on "3" and take the .270 into the brush and you'll be fine. Put it up on "9" and take long shots out to 200-300 yards and drop a nice 8 point buck in its tracks.